Not only can you search Google for converters, you can actually use Google as the converter as well. Simply type 16 millimeters in inches, and et voila!

Now, onto the barrel. Paintballs' OD is generally somewhere in the neighborhood of .68", (17.3 mm). So, therefore, your best choice is 3/4" aluminum hydraulic tubing. I've said this to every new person so far who asked about paintball barrels. If you get the 3/4" aluminum tubing that's not bendable and rated to 190 PSIG, then the inside diameter of this tubing is 0.68". They fit perfectly with paintballs.

markfh11q wrote:Not only can you search Google for converters, you can actually use Google as the converter as well. Simply type 16 millimeters in inches, and et voila!

Now, onto the barrel. Paintballs' OD is generally somewhere in the neighborhood of .68", (17.3 mm). So, therefore, your best choice is 3/4" aluminum hydraulic tubing. I've said this to every new person so far who asked about paintball barrels. If you get the 3/4" aluminum tubing that's not bendable and rated to 190 PSIG, then the inside diameter of this tubing is 0.68". They fit perfectly with paintballs.